Question

我的Android应用程序以Facebook登录页面开始，如果用户被记录，则跳转到主页。

问题是，如果用户被记录为jet，则主页将显示一秒钟。

这是我的入门代码：

public class MainActivity extends AppCompatActivity {

private SectionsPagerAdapter mSectionsPagerAdapter;

private ViewPager mViewPager;
private AccessTokenTracker mAccessTokenTracker;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
    FacebookSdk.sdkInitialize(getApplicationContext());
    AppEventsLogger.activateApp(this);
    final Context context=this;

    if (AccessToken.getCurrentAccessToken() != null) {
        mAccessTokenTracker = new AccessTokenTracker() {
            @Override
            protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) {
                mAccessTokenTracker.stopTracking();
                if(currentAccessToken == null) {
                    Log.i("LOGIN","ALL PERMISSION DELETED, SKIP TO THE LOGIN");
                }
                else {
                    //CHECK PERMISSION ONE BY ONE
                    String current_permission =currentAccessToken.getPermissions().toString();
                    if (current_permission.contains("user_photos") && current_permission.contains("user_post") && current_permission.contains("public_profile")) {
                        Toast.makeText(getApplicationContext(), "YOU ARE LOGGED IN", Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(context, HomeActivity.class);
                        context.startActivity(intent); //USER IS LOGGED IN AND HAVE ALL PERMISSION SO GO TO THE HOME PAGE
                    }
                }
            }
        };
        AccessToken.refreshCurrentAccessTokenAsync();
    }
    else {
        Log.i("LOGIN","NEED TO LOG IN");
    }
    setContentView(R.layout.activity_main);
    ......
    //GO TO THE LOGIN PAGE

我如何避免这种情况以及什么是最佳实践？

Answer 1

如果您的用户已登录，请确保在调用startActivity（）后不调用setContentView（）。这样，除非用户未登录，否则您不会对布局进行充气。

您可以通过多种方式执行此操作，包括在调用startActivity（）之后从方法返回。

登录页面显示一秒钟

1 个答案: